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Variety · Silicate

Hessonite

Ca₃Al₂(SiO₄)₃

Orange-brown grossular garnet with a characteristic roiled interior.

Hardness6.5–7
Crystal systemCubic
ClassSilicate
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Hessonite specimen

garnet var. grossular, var. hessonite, clinochlore : Colle del Paschiet (Colle del Paschietto), Balme, Ala Valley, Lanzo Valleys, Torino Province, Piedmont, Ita — Photo: Parent Géry · Public domain

Hessonite

Also known as: Cinnamon stone.

The orange-brown 'cinnamon stone' variety of grossular garnet.

Intro adapted from Wikipedia (CC BY-SA).

Hessonite is a mineral variety of Grossular, with the chemical formula Ca₃Al₂(SiO₄)₃.

It crystallizes in the cubic crystal system.

Key properties: Mohs hardness 6.5–7; typically orange or brown or red.

Collections: Gemstones.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet. Browse more H minerals or help write this entry.